Page:NIOSH Manual of Analytical Methods - 6010.pdf/5

 HYDROGEN CYANIDE: METHOD 6010, Issue 2, dated 15 August 1994 - Page 5 of 5 APPENDIX: STANDARDIZATION OF CALIBRATION STOCK SOLUTION Titrate an aliquot of the cyanide standard stock solution (Reagent 12) with standard silver nitrate (AgNO3) solution. The end point is the first formation of a white precipitate, Ag[Ag(CN) 2]. Calculate the cyanide concentration with the following equation: Mc = 52.04 Va (Ma/Vc) Where Mc = cyanide concentration (mg/mL) Va = volume (mL) of standard silver nitrate solution Ma = concentration (moles/L) of standard silver nitrate solution Vc = volume (mL) of calibration stock solution titrated

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition, 8/15/94